References
- Kotler , P . 1986 . Principles of Marketing , Englewood Cliffs, New Yersey : Prentice Hall International .
- Schuurmans , AJ and Smidts , A . 1990 . Marketing in the veterinary practice: a theoretical framework . Tijdschr Diergeneeskd , 6 (115) : 262 – 71 .
- AUV, P.O. Box 94, NL‐5430 AB Cuijk. the Netherlands